US2446093A

US2446093A - Hoist frame

Info

Publication number: US2446093A
Application number: US727698A
Authority: US
Inventors: Edward J Lambert
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-02-10
Filing date: 1947-02-10
Publication date: 1948-07-27
Anticipated expiration: 1965-07-27

Description

July 27, 1948. E. J. LAMBERT HOIST FRAME 2 Sheets-Sheet 1 Filed Feb. 10, 1947 I fineutor (fafl m/ ,MWWW

v Gttornegs July 27, 1948. E. J. LAMBERT 2,445,093

HOIST FRAME Filed Feb. 10, 1947 2 Sheets-Sheet 2 (Ittomegs.

Patented July 27, 1948 UNITED STATES; PATENT OFFICE Edward J. Lambert, Quincy, 111.. Application February 10, 1947, Serial No.727,698

7 Claims. (01. WIS- 237) My present invention has for its object to provide a frame for supporting hoisting apparatus which is particularly adapted for use upon the roofs of buildings for elevating building materials and other goods.

A further object of my invent-ion is to provide a form of frame which is adjustable for use on roofs'of different pitch and also adjustable to position the rigging boom advantageously both with reference tothe location of its forward end relatively to the face of abuilding and as to its most convenient elevation with respect to the eaves of a roof or to a coping, a fire wall or other part of a building structure which may project above the edge of a roof.

To these andother ends my invention has for its object to provide further improvements in con struction, all as will be fully described in the ace companying specification, the novel features thereof being set forth in the appended claims.

In the drawing:

Figure 1 is a side elevation 'of a hoist frame illustrating one embodiment of my invention.

Fi ure 2 is a front view of the foot portion of the forward supporting leg.

Figure 3 is a detail plan view of the ballast plate on the rear end of the boom. 1

Figure 4 is a sectional view on the line 4x4r of Fig. :1 showing the stirrup clamp for the boom.

Figure 5 is a View similar to Fig. 1 showing the parts in a different position of adjustment and embodying a modification in which there is employed a framework which is upon the roof.

Figure 6 is a plan View of the bed frame incorporated in structure of Fig. 4.

Figure '7 is a front view, similar to Fig. 2, showing the foot piece which is attached to the forward end of the bed frame.

Figure 8 is a perspective view of a form of cleat and stop which is attached to a pitched roof either to anchor the foot piece shown in Fig. 2 or the forward end of the bed frame illustrated in Fig. 5.

Similar reference characters in the several figures indicate similarparts. v

In the handling of roofing material and other goods which because of their bulk or weight require the use of a hoisting apparatus, it is the general practice to erect a temporary structure of heavy timbers at the site of each job. This was time consuming and expensive since successive jobs on which a roofer was required to work usually varied considerably due to the differences in structure encountered in different buildings.

To overcome these disadvantages I have provided a hoist frame which is universally adjust- 2 able and thus adaptable for use on buildings in which the roofs may be either fiat or pitched and on which the copings and fire walls may vary both inheight and thickness. In carrying out my invention I provide an extensible boom made of telescoping tubular parts I and '2, the 'former being intended to extend beyond the edge of a roof where it is provided with an eye 3 for the attachment of a block and tackle, and the latter carrying at its rear end a ballast plate 4 pivoted thereto for automatically accommodating itself to [the pitch of aroof. i l

The boom is made adjustable in length by providing its parts with a series of registering spaced apertures 5 through which a locking. pin may be inserted.

In Fig. 1 I have shown the hoist frame in the position it will occupy on a pitch roof as indicated by the dot and dash line 6. The boom is supported in a substantially horizontal position on a forward leg which is also composed of telescoping members I and 8 having a series ofspaced registering perforations 9 for the reception of alocking pin whereby the length of the leg maybe extended or shortened as desired. An adjustable pivotal connection unites the boom and its sunporting leg. In the present instance this is shown as mounted on the upper end of part 1 and comprising -a laterally extending stud l0 threaded to receive a nut having an operating handle II, and

also pivoted on the stud are the ears of a stirrup l'2 surrounding thepart l of the boom which, when compressed by the nut, rigidly connects the boom to the leg. At its lower end thelatt-er is ranged with their pintles at the rear side of the rail, thus permitting the free leaves of the hinges to accommodate themselves to any angular surface upon which they may rest. As a convenient means of rigidly connecting the lower end of the leg in a selected pos'iti-on on a roof I provide straps or cleats (see Fig. 8') which are to be mailed theretoand have upwardlycurved or hooked lower ends iii in which the hinge leaves may be engaged 1 A brace arm or strut extends from the lower portion of the leg to the rear end of the boom, and its ends have pivotal connections in brackets l9 and 20 which are secured to said parts. The strut is extensible to accommodate the relative adjustments of the boom and its supporting leg and therefore is composed of the telescoping tubes 2| and 22 having a series of perforations 23 for the reception of a locking pin.

To the rear part 2 of the boom, between the clip 26 and the ballast plate I fix chains 24 of sufficient length to serve as a means for securing weighty objects, such as a bundle of shingles, rolls of roofing material, or bags of cement, which may be 'placed in engagement with *the plate 4 and the end of the boom.

In Fig. 5 I have shown another adjustment which the parts may assume and therein I indicate a modification of the parts whereby the boom l is supported on a rigid leg 1*. The latter is supported at its lower end on a truss '(see'Fig. 7 similar to that shown in Fig. 2. In 'thi-s structure I employ a bed frame (Fig. 6) which is adapted to rest upon the roof. It is of V-shap'e and comprises side rails 3fl-3l of angle iron which diverge to form "a broad lower 'endformed by the connecting piece 32 to which the rail I5 of the boom supporting leg'is connected by hinges li, whereby it may be collapsed against the bed when the apparatus is notin'use. 'Atitsfnarrowupper 'end'thebed frame has a "cross-piece having up 'wartlly extending cars '34 to which the rear end of "th'eboom'is pivoted. The extension of the bed frame beyond the point of connection for the boom provides .a platform on which weighted objects maybe placed to anchor the rear end of the boom.

'I' claim:

1. ilin "an adjustable frame for supporting hoists, the-combination with 'a, bm composed of extensible parts, and a ballast plate at theinner e'nd o'fthe'inner part, of a vertical extensible ileg supporting ?the forward end of the forward :part of the boom andan adjustable strut connecting the rear end ofboom to the :lower end of said leg.

2. adjustable hoist frame comprising a boom having an inner end and outer end longitudinally "adjustable thereon, a ballast plate on said "inner end for anchoring :it, in. iverti'cal :leg

having aniupper extensible end, arclamp for-adjustably securin the latter to the forward ,:por- -tion of 'the'outerendof :the boomiand'a-l'longi- :tudinally adjustable strut connecting the lower end o'f the leg withthe :rear end'of theinner eportion-of the-boom forward of the ballastzplate.

v 3. =In -a :ira-me i for supporting I hoists on pitched sroof-s, the i combination with a i boom composed of telescoping front and rear :parts, :a ballast plate pivoted at ithe Jend'of the rearpart which auto- ?matically adapts itself :tothe slope of the roof, and an upright deg forsupporting the .forward section of the'boom comprising-telescoping upper and lower members,-of :a horizontal rail carrying "said ilowerimember, cleats for attachment to a .sloping roof having-hook shapedends-for engage- :ment with said rail, of a :clamp adjustablv connectingsaid upper member to'the boom, a strut composed of longitudinally adjustable sections ipiv-otally connected at their -extremities -to the flower member-of thelegand the-rear part of the boom and separate securing devices .for .locking the parts of the boom, theleg members and the shut sectionsin their.rel'ativetpositions of: adjustment.

4. In a hoist frame for use on pitched roofs, the combination with a horizontal boom having a ballast plate at its inner end conforming to the slope of the roof, a cleat having a hooked end for attachment to the roof at a point below the plate and a foot member engaging said cleat, of an upright leg carried by the foot and supporting the ballast plate at its inner end conforming to the slope of the roof, cleats having hooked ends "for attachm ent to the roof at a point below the plate and .a horizontal foot rail having hinge leaves engaging said cleats, and a strut extending rearwardly i'from the lower end of the leg and connected to the rear end of the boom adjacent the ballast plate.

6. In a frame for supporting hoists -0n roofs, the combination with a boom having a forward end for-extending beyond theside wall=of a-building and a rear end for engagement with-the roof of the building, an upright leg supporting the boom in rear of its forward end in rear-of a building side wall, and a ballast plate gpivotedito the rear end of the boom, of 'a' strutconneotin'g the lower end of the leg to :the rearrend 'of the boom at. a point forward of 'saidplatepsaid boom, leg and strut each comprising two telescoping members, means =for locking the same in their relative positions :of adjustment, and-amad'iustable clamping member for securing the upper end-of said leg'to the outer memberof the'boom.

7. In a frame for supporting hoistson pitched roofs, :the combination with a boom composed of telescoping front and rear .parts, the 'former for extending beyond the sidewall of a building-and the latter for engaging the roofiatazpoint spaced rearwardly from the building wall, 'a-balla-st plate pivotedatthefend of the rear part whichauto- *matically adapts itself to theslope of the roof, and an upright leg for :"supporting the .forward section of the boom adjacentto'and rearwardly of the building wall, saidvleg-icomprising-telescoping upper andilower -members,-of a clamp adjustablyiconnecting said upper memberto the-front part ofthe boom, astrut-composed of zlongitudinally adjustable "sections pivotally connected at their extremities to the lowez-memberof the :leg and 'the rear 'part of the-boom and separatesocuring devices for locking'the parts :of the'boom, the leg members andcthe:strutsectionsintheir relative position-of adjustment.

.EDWARD.J. rLAlWBER'IU REFERENCES CITED The Jfollowing references are of record in :the file 'of this patent:

UNITED STATES PATENTS Number Name Date f590;949 Wilken Sept. '28, 1897 986,456 Grafiam Mar. 14319 1 1 586,421 Frush .May 25,1926